Wood strain-insulator.



VPA'FENTED JUNE 5, 1906.

T, G. WHTB. WOOD STRAN INSULATOR.

IPPLICATION FILED AUIG17,1905.

UNITED sTATEs PATENT oEEIoE.

Specification of Letters Patent.

Patented June 5,1906.

Application led August '7, 1905. `Serial No. 273,188.

To'aZZ when?, t may concern:

Be it known that I, THOMAS C. WHITE, a citizen of the United States, residin in the city of St. Louis, in the State of 'ssouri,' have invented certain new and useful Improvements in Wood Strain-Insulators, of

which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

IMy invention relates to that class of wood strain insulators commonly used in the strain, stay, or su porting wires sustaining overhead electricalpconductors; and the .invention has for its object to produce an insulator of the kind named in which the total strength of the wood will be retained and the wood be less subject to the ingress of mois#A ture than in similar insulators heretofore in use.

`A further object ofthe invention is to pro- I vide a more permanent and more tightly fitting union between lthe wood insulating portions of the ,insulator and the clips secured thereto.

In the reduction of Wood strain-insulators as hereto ore'made it has been common practice to secure the clips. to the wooden insulating portion of the insulators by `driving wedges into the ends of the insulating por-l tion to en and the wood in the clips and Ipro-` duce a tig t union between the parts. n so doin the wedges separate the fiber-of the woo and act with a crushing or breakin effectV thereon which renders the wood muc more susceptible to the ingress and absorption of moisture into its texture, thereby permitting rapid decay of the wood and eatly diminishing the durability of the insu ators. By my im rovement I overcome these difficulties an produce a much more durable 1n- ,sulatoiz Figure I is in part a side view and in part a longitudinal section of m'y. insulator. Fig'. II is a view of one of the end portions of the wood body of my insulator. Fig. III is a longitudinal section taken through one oi the clips. Fig. IV is a crosssection taken on line 'y y, Fig I, with the'wood body omitted. Fig". V is a side view of one of the clips withl the members thereof separated. Fig. VI is a;

lan view of one of a pair ofthe cli -sections ig. VII is a lan view of the c i -section mating with t at shown in Fi I. Fig. VIII is a similar view to Fig. I, lustrating a modilication of the clip secured to the Wood body of the insulator. Fig. IX is a face view of one" of the clips of modified form. Fi X is a longitudinal section taken on line o o, lig. IX. Fig. XI is a transverse section taken on line X X, Fig. VIII.

1 designates the Wood bod of my insula-l tor, which` terminates at eac endin a conical portion 2, the bases or greatest diameters of the conical portions being at vtheir outer extremities, from which points they taper or narrow inwardly to the junctions with the central portioncf the Wood body. The cli s secured to the conical portions'at the en s of the wood body of' the insulator consist of pairs of sections or halves that are composed of semiconical sleeve portions 3 and 3 shaped to correspond to se ments of the conical portions' of the wood bo y and applied to said portions so as to mate thereon and t circularly around them and against their bases. One of the cli sections-as, for instance, that 3-is provi ed with an ear 3, projecting from its outer end and which carries a tongue 5. The mating clip-section is provided with an ear 3b, that receives the -engagement of the tongue 5, the said ear being preferabl apertured for the passage of said tongue t erethrough, as seen in Figs. I and III. In attachin the sections to each other the tongue 5 is adapted to be bent over Y onto the ear 3b in connection with each pair of cli -sections The cli -sections are also unite at their sides by t e ton s 5b, that are carried by langes at the si es of one of each air of sections and which are secured to si eilang'es of the mating clip-sections, preferably by passing the tongues 5b through apertures in t e side a es of clip-sections opposing those b which t e tongues are carried, as seen in igs. I and IV. The a ertures through which the ton ues 5 an 5b pass are indicated at 5a. rojecting in wardly from the inner faces ofthe sleeve ortions of the clip-sections are spurs 6, w 'ch are adapted to enetrate the conical portions of the wood bo y of the insulator to serve as a means of preventing turnin ofthe clips upon the conical portions', Eaci of the clip-sections is provided with a loop 7, which is adapte ed to mate with a corresponding loop of the mating clip-section, to -thereby provide eyes for the connection of the stays, guys, or

strain-wires to the insulator.

In Figs. VIII to XI, I have shown a modiication in which the clip-sections of the insulator and the Wood body are of the same those pioviooy os=(-ii od, coloro liaioo of sim-ood body having conical p \i numerals boing emploi in d tions its ends, the bases oi' which dis mi u i osod outwardly i'om dio @ont I j ortiou of oousruotion in ii@ mo uomini sl siy-doscribod consm'uoioo is s 66"@ portions coreoponding n coni/ooi to u of me tongues ooi zogine its of said @oni/oai poiions ani adopt gothoi in mating pms l umili@ odio ombmoofsnid conica] poioioiis subsmiriveis 5, b which ih@ Sections hoi( astiziiiy sot orh. sembiedwben pff/lied o *tfno coni/oai portions iro a Wood strain-iusuiatoi', tho oombi- 5o of the Wood body of ho iiisuiaigoi. .intimi oi o Wood body hfving ooiici poidaimli '-io 5 zot itb ends, of clip-.s @Hons having s @evo portions fitted to Said conical portions na. 'on of a Wood body ,c and having' contours corresponding to sogn tions is omis and o'ip ronsist or pairs monts of said portions; and moans io" uiiibof sections sooiiod tosaid comic/ai portions, ing Said clip-sections; in mating Avail7 Sofosubson oily Sen forth. sta-utiaiiy as sot forth.

i oi a Wood oodj kaf tioi at 11i." ends, 'Zhohas@ a. wood strain infini? or, the onibi- 7. l?. a Wood siriiofiiisuiatoi", lie combiiia 1f a Wood body lia-Vins: ooiiioai pornation of a Wood. body hving ooioai por-- tions t its ends, 'the bsos of f oioii are distionS its ends, paiis of clip-:5o.tions having oo poseo. ouumidiy fiom he oenai poion o1 sieove poitions itto. to said oonica portions saic body, of oiip-seoions having mici having oon'toua ooxiespondiogf to Segsioovpol'bions secured to oouioai por i f said conical portions said; sooooos tions, substantioiiy sot boing provided with tor ues iii/i sots foi* Se- 3: lo a Wood straiwinsulf. i' tin 65 i Y Y i itsonds, pairs of clip-so a, wood` Smin wood ood indi; from th 1 fino? i216 xi od to ou ation," s@ cured tions; son :ieovo portions i; upon 'a3-noir iiiior Wih i iaiy a3 soi; forth.

WoodA 

